Some old test URLs not working?

Hi there,
I often copy/paste my test-result URLs into emails or bookmark them. It is easier to re-run the test…

Some URLs are really old (over 3 years) but still work: https://www.webpagetest.org/result/160627_VN_YFM/

Some URLs are rather young and do not work any more: https://www.webpagetest.org/result/190424_A0_fa4667b8e7541e265aeb54a19af2c158/

→ Which result URLs “stay” and which results break?
(or can I change the URL to show me the results for all test-URLs?)

thanks for any help!